Pump-action control for typographical machines



1929. o. GQWOODHOUSE 1,722,375

'PUMP ACTfOW CONTROL FOR TYPOGRAPHICAL MACHINES Filed km. 26, 1928 5Sheets-Sheet 1 IN VE/YTOK Ora/g6 Z aazflzawe A TTORNE I July 30, 1929.o. G. WOODHOUSE PUMP ACTION CONTROL FOR TYPOGRAPHICAL MACHINES FiledJan. 26, 1928 3 Sheets-Sheet 2 ATTORNEY INVEN TOR. ///w;zy, Z/aaflawe 3Sheets-Sheet ar y IgI ENTOR.

ATTORNEY July 30, 1929. o. G. WOODHOUSE PUMP ACTION CONTROL FORTYPOGRAPHICAL MACHINES Filed Jan. 26, 1928 w ill lhlll Patented July 30,1929.

UNITED STATES 1,722,876 PATENT OFFICE.

ORANGE G. WO ODHOUSE, 0F SYRACUSE, NEW YORK, ASSIGNOR TO INTERTYPE COR-PORATION,

OF NEW YORK, N. Y.,

A CORPORATION OF NEW YORK.

PUMP-ACTION CONTROL FOR TYPOGRAPHICAL MACHINES.

Application filed January 26, 1928.

The present invention relates to improvements in typographical machinesand more especially to those of the general class shown and described inLetters Patent Nos. 436,531 and. d36,532 granted September 16, 1890, toO. lllergenthaler, wherein character-bearing matrices are stored in amagazine and delivered therefrom, under the control of a keyboard, andassembled in a line and justified and then presented to a mold intowhich molten metal is injected from a metal pot, thereby casting a slugor type bar an edge of which bears printing characters which arecounterparts of the characters borne by the assembled matrices.

In the development of machines of this general class, there has been ademand for one capable of casting type bars the character-bearing facesof which are relatively large, and to enable such extendedcharacterbearing faces of such type bars to withstand the pressureimposed upon them incident to printing therefrom, and especially whensuch type bars are subjected to the great pressure employed in dry-matprinting processes, it has been necessary to employ molds havingcavities of relatively large dimensionsso that the bodies of the typebars will be sufficiently massive or strong to sustain the pressureimposed upon the printing face. ,7

However, owing to the relatively large dimensions of the cavities ofsuch molds difliculty has been experienced in the casting of type barstherein which are free of large air holes or voids, it having been foundthat con'ipletc solidification of the metal compos ing the body of thetype bar, especially the rear portion thereof, does not ordinarily takeplace within the allotted portion of the cycle of the operation of themachine, and consequently the portion of the injected molten metal whichhas notsolidified will be drawn back by the return stroke of the metalpump plunger which is ordinarily used to inject the molten metal andwhich, according to the usual practice, is operated on its return orsuction stroke very quickly or within a very few seconds after the castis made.

The object of the present invention is to provide means for overcomingthe objections above referred to and to enable large bodied type bars tobe cast which are solid or free of air holes, it providing means formomenmetal forming the type bar.

Serial No. 249,?25.

tarily checking or causing a pause in the operation of the machine whenit reaches the casting period so that the operation of the metal potplunger will take place through a relatively prolonged period of timewhich will be suflicient to insure complete evacuatron of air from themold cavity and more complete solidification of the entire body of Tothese and other ends, the invention consists in certain improvements andcombinations and arrangements of parts all as will be hereinafter morefully described, the features of novelty being pointed out particularlyin the claims at the end of the specification.

In the accompanying drawings Fig. 1 is a perspective view of the meanspreferably employed for stopping or producmg a pause in the operation ofthe machine during the casting period, the same being shown applied to aline casting machine of Well known construction;

Fig. 2 is an elevation of a portion of the device shown in Fig. 1 asviewed from the right hand side thereof;

Fig. 3 is a detail sectional View of the usual line delivery andelevator transfer cam but'provided with a pawl or dog used in carryingout the present invention;

Fig. 4 is a rear elevation of the stopping device of the presentinvention as viewed from the rear of the machine, illustrating themanner in which the device stops the operation of the machine; and

Fig. 5 is a view similar to Fig.4 but showing the positions which theparts of the stopping device occupy immediately after the machine hasbeen restarted.

Similar parts are designated by the same reference characters in all ofthe figures.

The present invention is applicable generally to line casting machinesof the class hereinbefore referred to, it being shown applied in thepresent instance to a line casting machine of a type which is well knownand in extensive use, 1 representing a portion of the main column of themachine, 2 representing the main cam shaft thereof, 3 representing aportion of the so called line delivery and elevator transfer cam whichis fixed on the main cam shaft 2, 4 representing a portion of the usualautomatic stopping lever and 5 representing a portion of the usualvertical starting lever, commonly used on machines of this type, thevertical starting lever 5 being normally held by spring action in theposition shown in Fig. 4 but being movable into the position shown inFig. 5, against such spring action, in starting the machine, theautomatic stopping lever 4 usually cooperating with a pawl a suitablypositioned on the cam 3 to stop the'operation of the machine, andmovement of the lever 5 into the position shown in Fig. 5 dislodgingsuch pawl from the lever 1 and thus starting tho machine in accordancewith the usual practice. 6 represents a portion of the usual metal potpump lever which actuates the plunger inthe metal pot to inject themolten metal into; the mold after a line of matrices has been presentedthereto, as is well known in the art, the metal pot lever being operatedon its downward or metal injecting stroke by a spring and its time ofoperation and also its return stroke being controlled by acam-on themain cam shaft- 2, as is common in machines of this type.

reached and According to the present invention, an additionalstopping-pawl 7 is mounted on the ca m 3 at a suitable angle around itscircumference in rear of the regular stopping pawl 4}, it being arrangedthereon so that it will come into position to act on the automaticstopping lever 4 immediately after the drop in the metal ot pump levercam has been t hepump lever Ghas been released and has commenced itsdownward metal injecting stroke under the action of the actuatingspring. This pawl is pivoted on a pin 8 which may be supported by lugs 9on the hub of the cam 3 so that the outer or free end of the pawl mayswing in the direction of the axis of the cam, and the pawlis normallyheld in the full line position shown in Fig. 3 and against an abutment 3forming part of the cam, by a compressed spring10 which acts against aside of the pawl. The treeend of thepawl projccts beyonc the peripheryof the cam 3, and

when the pawl is shifted into'the dotted line position shown in Fig. 3,it will be in a posi- .,tion to engage the top of the automatic stoppinglever 4, as the cam 3 rotates in a clockwise direction in Fig. 2, andthe consequent depression of the automaticstopping lever 4 will stop theoperation of the machine by disengaging the main driving clutch, throughthe instrumentalities commonly used in machines of this type whichconnect the automatic stopping lever 4 to the mainclutch control. On theother hand,

when the pawl 7 occupies the full line positionshown in Fig. 3, it willclear the automatic stopping lever 4 and the machine will then operatein the usual way and the casting' operation will take place as usual or":without a pause in the operation of the machine.

Means is provided for bringing the stopping device of the presentinvention into operation while .a mold having a large cavity for thecasting of type bars having masmay be fixed to a plate 1 1, the latterbeing bolted or otherwise secured to the main column of the machine andserving to support the stopping mechanism thereon. I The rear end of therod 11 is bent downwardly to form an arm 15 which occupies a position infront of the cam 3, and this arm is adapted to rest in one or another ofa pair of forwardly and rearwardly spaced notches 16 and 17 formed in abracket 18 which is fixed to the rear side of the plate 14, the armbeing held in one or the other of these notches under the tension of aspring 19 one end of which may be connected to the arm 15 while itsopposite end is attached to the bracket 13. Partial rotation of the rod11' a by force applied to the handle 12 on its forward end will serve todisengage the arm 15 from either one of the notches, and the arm may betransferred from one notch to the other by shifting the rod 11 endwisewhile the arm 15 is held out of engagement with the bracket 18. lVhenthe arm 15 rests in the forward notch 16, as is shown by the full linesin Fig. 2, it will occupy a plane forward of or beyond the end of thepawl 7 which projects from the periphery of the cam 3, and hence thepawl 7 will pass the arm 15 uninfluenced by it, but when the arm 15rests in the rear notch 17, it will be in the path of the outer or freeend of the paw 7, as is indicated by the dotted lines in Fig. 2, and asthe cam 3 rotates to bring the pawl 7 toward the automatic stoppinglever l, the

outer end ofthe pawl 7 will come into engagement with the adjacent sideof the arm 15, and as the latter is inclined toward the automaticstopping lever 4 and is held in such position by the spring 19, the pawl7 will be swung about its pivot pin 8 from the full line position to thedotted line position shown in Fig. 3, or from the dotted line positionto the full line position shown in Fig. 4, so that when the'pawl reachesthe full line position shown in Fig. 4, itwill be immediately above andin line with the automatic stopping lever 4 so that it will bear thereonand force this lever 1 downwardly, thereby causing the stoppingmechanism actuated by the stopping lever 4 to disengage the main clutchand stop the operation of the machine. The arm 15 deflects the pawl 7from the full line to the dotted line position, Fig. 3, against theaction of the spring 10, the spring 19 which holds the arm 15 inposition, being of superior strength.

into the mold is sufiicient to overcome While the pawl 7 rests on thestopping lever 4, the machine will be held from further operation, butduring this pause in the operation of the machine, the metal pot pumplever 6 is descending to force molten metal into the mold to cast thetype b ar therein, the cam controlling the operation of the pump lever 6being in such position as to permit such operation of the pump leverwithout obstruction. The machine is again set into operation after themetal injecting operation has been performed, and such restarting of themachine, according to the present invention, is accomplishedautomatically and under control of the pump lever, so that the machinewill not be restarted to cause the return stroke of the metal pump totake place until after a sufficient time has elapsed to effectevacuation of all air from the mold and complete solidification of themetal injected therein. In the construction shown, a lever 20 is pivotedat 21 on the plate 14, the free end of this lever extending beneath thepump lever 6 and being held in engagement therewith by a tension spring22. This lever is formed, at a point near its pivot, with a shoulder 23which is arranged opposite to the upper end of second lever 24;, thelatter being pivoted a 25 to the supporting plate 14 and having a toe 26on its lower end which is arranged to swing against the verticalstarting lever The upper end of the lever 24 is preferably provided withan adjustable set screw 27 which is arranged to bank against theshoulder 23 on the lever 20, adjustment of this screw enabling theoperator to vary the period of time during which the operation of themachine is interrupted during the casting operation to conform with thesize of the body of the type bar to be cast. The pump lover 6 descendsto inject metal into the mold under the action of a relatively strongspring, when the drop in the pump lever cam is reached during therotation of the main cam shaft, the pump lever 6 descending under suchspring pressure as the molten metal flows into the mold, and the pumplever cam has a rise which, during further rotation of the main camshaft, comes into action to lift the pump lever 6 and thereby operatethe metal injecting pump on its suction or return stroke, such partsbeing commonly used in line casting machines of the class to which thepresent invention is applied, the construction and mode of operation ofthe pump lever, metal injecting pump and pump lever cam being wellunderstood so that illus :2- tion of such parts herein is believed to beunnecessary.

The strength of the spring which forces the pump lever 6 downwardly toinject metal tension of the spring 22 which maintains lever 20 1ncontact wlth the under side of pump lever and to overcome the action ofthe spring which normally holds the vertical starting lever 5 in theposition shown in Fig. l and to also overcome the tension of the spring19 which normally holds the I arm 15 in the position shown in Fig. 4.While the pawl 7 acts immediately after engaging the automatic stoppinglever l to disengage the main clutch and stop the op eration of themachine, there will be a retarded but continuel descent of the pumplever 6, due to the re lstance offered to the flow of the molten metalinto the mold and the evacuation of air therefrom, so that while thedrop in the pump lever cam has been reached and the pump lever cam hasceased to rotate, due to stopping of the machine, the pump lever 6continues its descent while the machine is idle, and during the descentof the pump lever, the lever 20, which is always held against the underside of the pump lever by the spring 22 and begins to descend as soon asthe pump lever begins to descend, is swung downwardly in unisontherewith, thereby moving L126 shoulder 23 thereon toward and intoengagementwith the adjacent end of the set screw 2?, and as the downwardswing of the lever 2t) continues under the continued descent .of thepump lever 6, the lever 2% is swung from its normal upright positionshown in Fig. toward the right sufficiently to bring the heel 2G thereonagainst the upright start ing lever 5 and to move the latter from theposition shown in Fig. as) that shown in Fig. 5, and as the startinglever 5 occupies a position immediately beside the pa vi 7 which at thistime rests on the automatic stopping lever l, the latter part of theswing of the lever 2% toward the right under the continued descent ofthe pump lever (5 and the interposed lever 20 will cause displacement ofthe pawl 7 laterally and toward the right until it clears the stoppinglever l. As the disengagement of the pawl 7 from the stopping lever land the actuation of the vertical starting lever 5 sets the machineagain into operation, the pawl 7, which 1o-- tates with the cam 3, willpass at the right hand side of the stopping lever A, as is indi cated bythe full and dotted lines in Fig. It will be understood that the arm 15is pushed aside or laterally from the dotte-i line position. to the fullline position in Fig. 5 during disengagement of the pawl 7 from thestopping lever i, the power of ti o spring which forces the pump lever 6downwardly being sufficient to overcome the tension of the spring 19.After the 'am 3 has rotated to a position beyond the lower end of thearm 15, the latter returns to full line posi tion Fig. at or its dottedline position Fig. under the action of the spring 19 it then being inposi on to direct the pawl 7 on to the automati stopping lever duringthe neXt following casting operation, and the machine is automaticallystopped upon completion 01 its cycles of operations by the engagement ofthe regular stopping pawl l with the stopping lever l and the associatedstopping means usually employed in machines of this type. The adjustablescrew 27 may be set to vary the period during which the operation of thenr chine is interrupted, as its adjustment serves to vary the stroke ofthe lever 24 under the action of the lever 20 so that the heel 26 willengage the starting lever 5 and dislodge the pawl 7 from the stoppinglever at an earlier point in rolati on to the descent of the pump lever6 when slugs of the relatively smaller sizes are being cast than wienslugs oi the largest size are being cast, it thus enabling the period oirest in the operation of the machine to be varied according to whethermolds having cavities of medium or large sizes are in use, andconsequently, ample time will be allowed for sufficient descent of thepump lever to insure complete injection of metal into the mold beforethe machine is a, 'n started into operation, and the delay thus providedbefore the rise in the pump lever cam is reached and the metal injectingpump is operated on its return or suction insures the solidification oi'the entire body of metal forming the slug, so that no metal will bewithdrawn or sucked out of the mold by the suction stroke of the pump.

The operation of the device is briefly as follows. During the normaloperation of the machine using molds of the usual or standard sizes, therod 11 is in its forward position and the arm 15 thereon is held in theforward notch 16 under the action of the spring 19. The arm 15 will thenoccupy the full line position shown in Fig. 2 and hence it will bebeyond and out of the path of the end of the pawl 7 which projectsradially beyond the periphery of the cam 3. The machine maythereforeoperate under the control of its usual stopping and startingmeans and without interruption during the casting operation. However,when type bars are to be cast in a recessed mold or other large bodymold, the rod 11 is rotated in the appropriate direction, by its handle12 to disengage the arm 15 from the forward notch 16 and the rod is thenpushed rearwa-rdly and the arm 15 is allowed to enter the rear notch 17under the tension of the spring 19. When the arm 15 is in this position,as shown by the dotted lines in Fig. 2, it is in the path of the end ofthe pawl 7 which projects beyond the periphery of th cam 3, and it willbe held under the yielding action of the sprin 19 in the inclined position shown in Fig. a, it sloping toward the automatic stopping lever l.

hen the machine is stared in the usual way by sending in an assembledline of matthe automatic stopping lever.

1,72ae7e rices, the cam 3 rotates in the usual manner from its normal orstarting position shown in Fig. l in the direction indicated by thearrow in Fig. 2, the pawl 7 rotating with this cam. When the pawl 7approaches the automatic stopping lever l, the right hand side of thepawl comes into contact with the inclined arm 15, as indicated by thedotted lines in Fig. 4, and as the rotation of the cam co. tinues, thepawl is deflected toward the left until its lower edge stril es the lug4 of This obstruction momentarily checks further rotation of the cam 3and simultaneously, the pressure of the pawl 7 on the automatic stoppinglever causes this lever to "function in the usual manner to disengagethe main driving clutch and to thereby arrest the operation of themachine. Immediately prior to the contact of the pawl 7 with theautomatic stopping lever, the pump lever cam reaches a position wherethe drop therein releases tne pump lever to permit its descent under thaction or the usual spring, and the pump lever tierefore descends toinject metal into the mold to cast the slug or type bar therein and toevacuate air from the mold. Descent of the pump lever 6 causes the lever20, which engages its under side, to also swing downwardly, and theshoulder 23 thereon is thus caused to act on the end of the set screw 27whereby the lever 24 is swung toward the right from the position shownin Fig. 4. The heel 26 of this lever is thereby brought against the lefthand side of the spring control ed'lug 5 of the vertical starting lever,

and as the descent of the pump lever continues, the vertical startinglever is swung toward the right, causing it to contact with the pawl 7and to force the pawl 05 its seat on the lug 1- of the stopping lever,this displacement of the pawl taking place in opposition to the tensionof the spring 19. Inasmuch as the disengagement of the pawl 7 from thestopping lever 4 depends upon the descent of the pump lever 6, the pawl7 will not become dislod cd from the stopping lever l until tl e pumplever has completed a deli nite length of stroke predetermined by thesetting of the screw 27, and hence, by setting the screw 27 in contactwith or at an appropriate distance from the shoulder 23 on the lever 20,the disengaging of the pawl 7 from the stopping lever l may be made totake place sooner or laterin the down stroke of the pump lever toconform with the dimensions of the cavity of the mold in use.

Immediately following the disengagement of the pawl 7 from the stoppinglever 4c, the achine is rendered operative again, the au- "omaticstopping lever functioning in the manner usual in machines of this classto reengage the main driving clutch of the machine, and the restartingof the machine causes the cam 3 to rotate in the usual manner tocomplete the cycle of operations whereupon the machine is stopped in itsregular normal position by the re-engagement of the stopping pawl i withthe stop ping lever 4 and the stopping means actuated thereby commonlyused in machines of this type for that purpose. The restarting of themachine, following disengagement of the pawl 7 from the stopping lever4i, raises the pump lever 6 in the usual ianner by bringing the rise inthe pump lever cam into action, and the spring 22 causes the lever 20 tofollow the pump lever 6 and to remain in contact with it as it rises.The consequent upward swing of the lever 20 from the position shown inFig. 5 to the position shown in Fig. 4 allows the lever 24 to returnfrom the position shown in Fig. 5 to its normal upright position asshown in Fig. 4, under the action of the spring controlled verticalstarting lever which returns it to its normal position as shown in Fig.4, and as soon as the pawl 7 which advances with the cam 3, passes belowthe lower end of the arm 15, this arm is returned by the tension of itsspring 19 to the position shown by the full lines in Fig. i, it thenbeing in position to engage and deflect the pawl 7 during the neXt cycleof operations of the machine.

By stopping the operation of the machine immediately after the drop inthe metal pot pump lever cam has reached the point where it releases thepump lever, the interval of time elapsing between the releasing of thepump lever by the drop in its controlling cam and the return stroke ofthe pump lever by the rise in the cam is prolonged or eX- tended,thereby affording a longer period than is usual for the descent of thepump lever which injects the metal into the mold and evacuates airtherefrom, and the pause in the operation of the machine delays the timeof lifting of the pump lever which operates the metal pump on its returnor suction stroke, and hence a greater length of time is afforded priorto the suction stroke of the pump during which solidification of themolten metal injected into the mold may take place. The simpleadjustment provided enables the duration of the pause in the operationof the machine to be readily varied to conform with the size of thecavity of the mold in use.

By extending the setting rod to the front of the machine and thereproviding it with a handle for operating it, the device provided by thepresent invention for interrupting or producing a pause in the operationof the machine during the casting operation may be rendered operative orinoperative nor-' mally by the operator, to accord with the size of themold to be used, without requiring the operator to leave his usualposition at the front of the machine.

I claim as my invention 1. In a typographical machine having startingand stopping means and casting means including a member controlling themetal-injection operation thereof, means for producing a pause in theoperation of said member during the metal injecting operation.

2. In a typographical machine having starting and stopping means andcasting means embodying metal injecting means and a member controllingthe metal injecting operation thereof, means controlled by the operationof the metal injecting means for producing a pause in the operation ofsaid controlling member during the metal injecting operation.

8. In a typographical machine having starting and stopping means andmetal injecting cas ing means, means controlled by the casting means forstopping the operation of the machine after commencement of the metalinjecting operation and for restarting the machine upon completion ofsuch opera tion. v

4. In a typographical machine having starting and stopping means andcasting means including a metal pot pump lever operative to inject metalinto a slug casting mold, means operative to stop the machine aftercommencement of the metal injecting movement of said lever and torestart the machine under the control of said movement of said lever.

5. In a typographical machine having starting and stoppin means and ,ametal pot pump lever for inject-ing metal into the mold, means tocooperate with the stopping means for stopping the machine after saidlever has commenced its metal injecting movement, and means actuated bysaid lever and 0p erative to automatically restart the machine when saidlever reaches a predetermined point in its said movement.

6. In a typographical machine having starting and stopping means and ametal pot pump lever operative to inject metal into the mold, meanscarded by a part of the machine during its operation into cooperationwith the stopping means to stop the machine after the pump lever hascommenced its metal injecting operation, and means actuated by the pumplever and cooperative with the starting means to restart the machineautomatically after the pump lever has operated to a predeterminedextent.

7. In a typographical machine having starting and stopping means andcasting means operative to inject metal into a mold, means driven by apart of the machine dur-' ing its operation for stopping the machineafter the operation of the casting means has commenced, and meansactuated by the casting means during its operation for restarting themachine, meansbeing provided for varying the duration of the pause inthe operation of the machine.

8. In a typographical machine having starting and stopping means andcasting means operative to inject metal into the slug casting mold,means operative to stop the machine after the casting means hascommenced its operation, means controlled by the operation of thecasting means for restarting the machine, and adjustable means fortiming the operation of the last named means relatively to the operationof the casting means.

9. In a typographical machine having starting and stopping means and ametalpot pump lever operative to inject metal into a mold, a memberdriven by the machine during its operation and movable into engagementwith the stopping means to stop the machine after the pump lever hascommenced its metal injecting operation, an means controlled by theoperation of thepump lever and operative to disengage said member fromthe stopping means and to restart the machine.

10. In a typographical machine having starting and stopping means and ametal pot pump lever operative to inject metal into a mold, a pawldriven by the machine during its operation and movable into engagementwith the stopping means to actuate it to stop the machine when the pumplever is at the commencement of its metal injecting operation, and meansoperative by the pump lever during the metal injecting operation toactuate the starting means to disengage said pawl from the stoppingmeans and to restart the machine.

11. In a typographical machine having starting and stopping means and ametal pot pump lever operative to inject metal into a mold, a membermovable, during operation of the machine, into engagement with thestopping means to stop the machine when the pump leveris at thecommencement of its metal injecting operation, a pair of levers, oneoperative by the pump lever during its metal injecting operation and inturn ac:- tuating the other lever of the pair to operate the startingmeans to disengage said member from the stopping means and to restartthe machine.

12. In a typographical machine having starting and stopping means and ametal pot pump lever operative to inject metal into a mold, a membermovable, during operation of the machine, into engagement with thestopping means to stop the machine when the pump lever is released toperform its metal injecting movement, a. pair of levers, one arranged tobe actuated by the pump lever durin its metal injecting movement and theother arranged to actuate the starting means to restart the machine, and

adjustable means between said pair of levers 14. In a typographicalmachine having stopping means and casting means for injecting metal intoa mold, a member movable, during operation of the machine, toward thestopping means, and means capable of being set in. one position to causeengagement of said member with the stopping means to stop the machineduring the operation of the casting means and of being set in anotherposition. to cause said member to pass the stopping means withoutengaging 15. In a typographical machine having stopping means andcasting means for injecting metal into a mold, a pawl movably mounted ona partof the machine to be car ried, during operation of the machine,toward the stopping means, and an arm capable of being set in a positionto deflect said 1 ember into engagement with the stopping means to stopthe machine during the operation 01"- the casting means.

16. In a typographical machine having stopping means and casting meansfor inject-ing metal into a mold, a pawl movably mounted on a part ofthe machine to be carried thereby, during operation 01" the machine,toward the stopping means, means acting. on said pawl to manually holdit in a position to pass said stopping means, and an arm capable ofbeing set in one position to allow said pawl to pass it while the pawlremains in a position to pass the stopping means and of being set inanother position where it will deflect said pawl into engagement withthe stopping means tov stop the machine during the operation of thecasting means. I

17. In a typographical machine having starting and stop-ping means andcasting means for injecting metal into a mold, a pawl movably mounted ona part of the machine to be carried thereby, during the operation of themachine toward the stopping means, means acting on said pawl to normallyhold it in a position to idly pass the stopping means, an arm capable ofbemg set in one position where it will allow said pawl to pass it whilethe pawl remains in a position to pass the stopping means and of beingset in another position where it will deflect said pawl into engagementwith the stoppin means to stop the machine, means for yieldingly holdingsaid arm in'said latter position, and means operative by the castingmeans during its metal injecting operation to actuate the starting meansand to disengage said pawl from the stopping means against the yieldingaction of said arm.

18. In a typographical machine having stopping means and casting meansfor injecting metal into a mold, a pawl movably mounted on a part of themachine to be carried into proximity to the stopping means during theperiod of operation of the casting means, an arm capable of being setbeyond the range of movement of said pawl to allow it to pass thestopping means without engaging it and of being set within the range ofmovement of said pawl where it will deflect the latter into engagementwith the stopping means to stop the machine, manually operative meansarranged to be manipulated from the front of the machine for settingsaid arm in one or another of said positions.

In testimony whereof I have hereunto set my hand.

ORANGE G. WOODHOUSE.

